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General Description

The RT8010/A is a high-efficiency Pulse-Width-Modulated (PWM) step-down DC-DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8010/A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.

Two operating modes are available including : PWM/Low Dropout autoswitch and shut-down modes. The Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.

The RT8010/A enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper PMOS. RT8010/A enter shut-down mode and consumes less than 0.1μA when EN pin is pulled low.

The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 and WQFN-16L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2 accuracy, over temperature protection, and over current protection.

Features

● +2.5V to +5.5V Input Range

● Output Voltage (Adjustable Output From 0.6V to VIN)

? RT8010 : 1.0V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V

Fixed/Adjustable Output Voltage

? RT8010A Adjustable Output Voltage Only

● 1A Output Current

● 95 Efficiency

● No Schottky Diode Required

● 1.5MHz Fixed-Frequency PWM Operation

● Small 6-Lead WDFN and 16-Lead WQFN Package

● RoHS Compliant and 100 Lead (Pb)-Free

Applications

● Mobile Phones

● Personal Information Appliances

● Wireless and DSL Modems

● MP3 Players

● Portable Instruments